Intracellular (endoplasmatic) membrane systems and ribosomes: rough endoplasmatic reticulum (rER) in the cell of a seeker hyphen of dodder (Cuscuta odorata). The ribosome-covered cytosolic surface is typical for the rER. (I. D�RR, 1977)
Model of the endoplasmatic reticulum. The cistern (orange) is also called lumen. The cytosolic surface is studded with ribosomes (little red spheres). (according to W. R. BOWEN, 1969)